Re: [Xen-devel] bug when using 4K sectors?

[James Harper <james.harper@xxxxxxxxxxxxxxxx>]

> 
> > I would kind of expect it to work, as CD-ROMs have a larger sector
> > size (2kB
> > IIRC) and we support those...
> 
> For data blocks they are 2K, as are some magneto-opticals.
> 
> The more complicated case is modern hard disks, while you can access them
> on 512 byte boundaries they are actually using bigger block sizes but the 
> large
> blocks are not neccessarily on the 0 boundary in order to get optimal
> alignment for existing file systems and partitioning.
> 
> So knowing the block size isn't the whole story.
> 

Are you saying that Xen and/or Linux needs to worry about a user setting up a 
poorly aligned filesystem to pass to a VM? Seems simpler just to set things up 
right in the first place.

Or did you mean something else?

James


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